A kind of one-time programmable read-only memory data burning method

Abstract

The invention discloses a data burning method of a one-time programmable read-only memory (OTP ROM). The data burning method comprises the following steps of acquiring programming data by a burning tool; transmitting the programming data to an RAM (Random Access Memory) by the burning tool when initialization between the RAM in a burned chip and a burning interface is finished and a programming data transmission channel is prepared; judging whether the programming data is correctly written into the RAM; if the programming data is correctly written, writing the programming data into OTP ROM from the RAM; otherwise, ending the data burning of the OTP ROM of this time. According to the data burning method, the programming data is firstly written into the RAM and the programming data written into the RAM is checked; the programming data is written into the OTP ROM when the checking shows that the programming data is written correctly; besides, the programming data is transferred into the burned chip from the burning tool in one direction, and checking is performed by directly utilizing a check code; a programming data read-back function is not provided, thus no leakage of the programming data of the burned chip is guaranteed, and the accuracy and the safety of burning are greatly improved.

Description

technical field [0001] The invention relates to the technical field of data burning, in particular to a data burning method of a one-time programmable read-only memory. Background technique [0002] At present, the control chips used in home appliances and consumer electronics, such as touch chips, voice chips and main control MCU (Micro Control Unit, micro control unit) chips, etc., mostly use OTP (One Time Programmable, one-time programmable) programming method ;When the chip leaves the factory, the chip company needs to process and program the confirmed data or parameters, and burn it into the OTP ROM (Read-Only Memory, read-only memory) of the chip to be burned through the burning tool However, there are such problems in the burning method in the prior art: [0003] The programming tool directly writes the programming data into the OTP ROM of the chip to be programmed through the programming interface of the chip to be programmed, but this method is easily interfered by...

AI Technical Summary

Problems solved by technology

[0003] The programming tool directly writes the programming data into the OTP ROM of the chip to be programmed through the programming interface of the chip to be programmed, but this method is easily interfered by external factors and causes errors in the programming data. The external factors here include: The physical connection of the recording interface is abnormal or disturbed, the working voltage of the recording device is abnormal, and the manual operation is not standardized, etc., and the OTP ROM is one-time programmable. After the program is burned into the OTP ROM, it cannot be changed again, resulting in the OTP of the burned chip ROM resources are therefore reduced or destroyed or even discarded and cannot be used anymore

[0004] In addition, in order to ensure the accuracy of the programming data programmed, most programming tools read the programming data from the OTP ROM through the programming interface after the physical programming action is completed, and then verify whether the data is correct. This method will not only cause programming data Reading and writing errors occur in multiple moving links, and it is easy to cause the programmed data of the programmed chips that have been shipped out of the factory to be illegally read out and leak key data or parameters

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